(Pronounced: "True-dat") 1. Slang for "True that," meaning "That is true."; 2. an affirmation by one bro to another bro on a statement; 3. while perhaps not THE truth, an agreement with a homie's opinion, whether it be a like or dislike; 4. Another version of the word ssrite.

Another way of saying "True that!"
Also, this file has found its way into many viruses as a humorous title of a .dat file. Chances are, if you have this file on your desktop or root windows folder, you have been hacked.